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World 2-B is the second secret level of World 2 in New Super Mario Bros. 2. This level is filled with Parabombs from the sky and from cannons. There are also small hills on the desert floor which, when destroyed with a Bob-omb, will release items such as coins. Pokeys are also common here.
To unlock this level, the player needs to locate the secret exit in World 2-Ghost House.
Mario begins on the desert next to a pool of quicksand, where a Parabomb parachutes down to several ? Blocks containing a Fire Flower. A Pokey can then be found on a platform in-between quicksand pools with orange platforms above it, where another Bob-omb falls. More Bob-ombs and Pokeys can be found, along with another ? Block containing a Fire Flower. Cannons then begin to appear on a structure. This is followed by the Checkpoint Flag and ? Blocks containing a coin and a Fire Flower. There is a ? Switch in the middle Brick Block above the next cannon which makes two Coin Roulette Blocks appear for a limited time. More cannons follow, along with a Pokey. A Red Ring can be found on several orange platforms that follow, which causes eight Red Coins to parachute down along with Parabombs. Three more cannons come after that, followed by the Goal Pole.
Completing this level unlocks World 2-Castle, skipping World 2-4 and World 2-5.